XM4

XM4 may refer to:


 * XM-4 Blues, a satellite operated by XM satellite radio
 * XM 4, a radio channel from Sirus XM satellite radio; see List of Sirius XM Radio channels
 * South African type XM4 tender, a steam locomotive tender
 * Moller XM-4, a VTOL aircraft; see List of aircraft (Mo)
 * Lipán XM4, a variant of the Argentine drone Lipán M3; see List of unmanned aerial vehicles
 * XM4, a prototype version of the M4 carbine
 * XM4 rocket launcher U.S. helicopter armament subsystems